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Texas Instruments 74ACT16541DL
- Part No.:
- 74ACT16541DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16541DL.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,297
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Product details
Overview
74ACT16541DL from Texas Instruments is a 16-bit noninverting buffer/driver IC with dual 3-state output-enable control per 8-bit section, TTL-compatible inputs, 5-V supply operation, ±24-mA drive strength, and 3.1–9.2 ns propagation delay across –40°C to 85°C. It enables high-density data bus interfacing in industrial control backplanes and memory expansion modules.
For engineers reviewing the 74ACT16541DL datasheet, 74ACT16541DL pinout, 74ACT16541DL application, or 74ACT16541DL equivalent, key selection criteria include dual independent 8-bit 3-state enable architecture, SSOP-48 package thermal and layout advantages, flow-through pinout for signal integrity, and EPIC™ process latch-up immunity up to 500 mA at 125°C.
Technical Context
The 74ACT16541DL implements two electrically isolated 8-bit buffer sections, each requiring both OE1 and OE2 inputs low to activate outputs-enabling granular bus segment control. Its flow-through architecture routes inputs on one side and outputs on the opposite side, minimizing trace crossovers and reducing PCB layer count.
Distributed VCC and GND pins (eight total) suppress simultaneous switching noise at high-speed transitions, while the EPIC™ 1-µm CMOS process ensures TTL-level input compatibility and rail-to-rail output swing under ±24-mA load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports standard 5-V logic rails with ±10% tolerance for power supply variation |
| Output Drive | ±24 mA - sufficient to drive 50-pF loads at full speed without external buffering in backplane applications |
| Propagation Delay | 3.1–9.2 ns - guarantees sub-10-ns timing margin for 100-MHz synchronous bus designs |
| Input Compatibility | TTL-voltage - interfaces directly with legacy 74LS/74ALS logic without level-shifting circuitry |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial environments including factory automation controllers |
| Latch-Up Immunity | 500 mA at 125°C - exceeds JEDEC JESD78 Class II requirements, enabling robust operation in noisy ESD-prone systems |
| Power Dissipation | 1.2 W max (TA = 55°C) - compatible with standard SSOP thermal pads and forced-air cooling in dense layouts |
Pinout & Package
74ACT16541DL is housed in a 48-pin shrink small-outline package (SSOP-DL), 300-mil body width, 25-mil pin pitch, with exposed thermal pad option not included. Pin numbering follows standard DL top-view convention with Pin 1 in Q1 quadrant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24, 25, 48 | Output Enable (1OE1, 1OE2, 2OE1, 2OE2) | Active-low dual controls per 8-bit section - both must be low to enable Y outputs; enables independent bus segment isolation |
| 2–9, 36–43 | Inputs (1A1–1A8, 2A1–2A8) | TTL-compatible digital inputs - accept 0.8 V/2.0 V thresholds; internal clamping protects against overvoltage transients |
| 10–17, 33–40 | Outputs (1Y1–1Y8, 2Y1–2Y8) | 3-state CMOS outputs - high-impedance state prevents bus contention when OE is high; ±24-mA sink/source capability |
| 18, 20, 22, 26, 28, 30, 32, 34 | GND | Distributed ground pins - reduce ground bounce and improve noise immunity during simultaneous switching of multiple outputs |
| 19, 21, 23, 27, 29, 31, 35, 37 | VCC | Distributed power pins - decouple supply locally per functional block, minimizing voltage droop during fast edge transitions |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Input and output pins placed on opposite sides of package - eliminates layer jumps and reduces signal crosstalk in high-speed routing |
| Dual independent 3-state control per 8-bit section | Two OE inputs per section require logical AND condition - allows selective activation of half-bus segments without external gating logic |
| Distributed VCC/GND pin configuration | Eight power and eight ground pins interleaved - lowers effective power loop inductance by >40% vs. single-supply-pin SSOP packages |
| EPIC™ 1-µm CMOS process | Enables TTL-input compatibility with CMOS power efficiency - eliminates need for external level translators in mixed-logic systems |
| 500-mA latch-up immunity at 125°C | Guarantees immunity to destructive latch-up under worst-case ESD or surge events - critical for unattended industrial equipment |
Applications
| Industrial Backplane Interface | Memory Expansion Module |
|---|---|
Use Scenario: Interfacing microcontroller local bus to multi-slot industrial backplane with shared address/data lines. IC Role / Device Role / Timing Role: Bidirectional 16-bit bus buffer with independent 8-bit 3-state control - isolates CPU from peripheral slots during arbitration. Use Value: Flow-through pinout simplifies layer stacking; distributed power pins suppress noise from concurrent slot access, maintaining signal integrity at 25-MHz bus rates. | Use Scenario: Adding SRAM or Flash memory banks to embedded controller with limited I/O pins. IC Role / Device Role / Timing Role: Noninverting buffer driving memory address/data buses - provides fanout and level translation between MCU and memory devices. Use Value: ±24-mA drive strength ensures reliable setup/hold timing across 10-cm traces; TTL-compatible inputs eliminate need for external translators with legacy memory parts. |
| Programmable Logic I/O Expansion | Test Equipment Signal Routing |
Use Scenario: Extending FPGA or CPLD I/O count for high-pin-count sensor interface cards. IC Role / Device Role / Timing Role: 16-bit 3-state buffer enabling dynamic reconfiguration of I/O direction and bus sharing between multiple logic blocks. Use Value: Dual OE per section allows time-multiplexed use of same physical bus lines for analog front-end and digital control signals without hardware redesign. | Use Scenario: Automated test system switching matrix routing stimulus/response signals between DUT and instruments. IC Role / Device Role / Timing Role: High-speed bidirectional buffer isolating instrument channels - prevents loading and crosstalk during parallel test execution. Use Value: Sub-10-ns propagation delay enables precise timing alignment across 16-channel synchronized measurements; latch-up immunity ensures reliability during frequent hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT16244DLR | Inverting output polarity; identical pinout, timing, and drive specs | Requires logic inversion in upstream design; unsuitable where signal polarity must be preserved | Select only if system-level inversion is acceptable or already compensated |
| 74LVC16244ADL | 3.3-V only operation; lower drive (±24 mA @ 3.3 V); different input threshold (VIH = 2.0 V min) | Not interoperable with 5-V TTL systems; requires level-shifting for mixed-voltage backplanes | Prefer for new 3.3-V designs targeting lower power; avoid for legacy 5-V upgrades |
Compared with SN74ACT16244DLR and 74LVC16244ADL, the 74ACT16541DL uniquely delivers noninverting 5-V TTL-compatible buffering with dual independent 3-state control in SSOP-48 - making it the only drop-in solution for industrial backplane upgrades requiring signal polarity retention and mixed-voltage interoperability.
Availability
74ACT16541DL is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion modules, programmable logic I/O expansion, and automated test equipment signal routing requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT16541DL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.
The 74ACT16541DL belongs to TI's Widebus™ family of high-speed logic buffers, engineered specifically for noise-sensitive, high-density PCB applications requiring precise timing control and robust bus isolation in industrial control systems.
FAQ
What is the operating temperature range for the 74ACT16541DL?
The 74ACT16541DL is characterized for operation from –40°C to +85°C, meeting extended industrial temperature requirements. This range is validated per TI's SCAS208A datasheet and applies specifically to the DL-package variant. The 74ACT16541DL maintains full electrical performance-including ±24-mA drive strength and sub-10-ns propagation delay-across this entire range without derating.
Does the 74ACT16541DL support true 3-state operation with high-impedance outputs?
Yes, the 74ACT16541DL provides true CMOS 3-state outputs. When either OE1 or OE2 is high for a given 8-bit section, all corresponding Y outputs enter a high-impedance state with leakage current ≤ ±5 µA at VCC = 5.5 V. This behavior is confirmed in the FUNCTION TABLE and electrical characteristics table (IOZ parameter) of the official datasheet, ensuring reliable bus contention avoidance.
Is the 74ACT16541DL pin-compatible with other Widebus™ 16-bit buffers like the 74ACT16244?
No, the 74ACT16541DL is not pin-compatible with the 74ACT16244 series. While both use the DL package, the 74ACT16541DL has dual OE inputs per 8-bit section (four OE pins total) and flow-through pin mapping, whereas the 74ACT16244 uses single OE per section and different pin assignments. The 74ACT16541DL pinout is unique to its dual-OE architecture and verified in the top-view diagram of SCAS208A.
What is the maximum continuous output current rating for the 74ACT16541DL?
The 74ACT16541DL supports ±50 mA continuous output current per pin, as specified in the Absolute Maximum Ratings table. However, the recommended operating condition limits IOH/IOL to ±24 mA to ensure timing compliance and thermal stability. Exceeding ±24 mA may increase propagation delay variation and junction temperature beyond safe margins in sustained operation.
Can the 74ACT16541DL be used in mixed-voltage systems with 3.3-V logic?
The 74ACT16541DL is designed for 5-V operation (4.5–5.5 V) and features TTL-compatible inputs (VIL = 0.8 V, VIH = 2.0 V), allowing direct connection to 3.3-V CMOS outputs that meet those thresholds. However, its outputs swing rail-to-rail at 5 V, so interfacing with 3.3-V-only inputs requires external level translation or series termination to avoid overvoltage damage.
74ACT16541DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74ACT16541DL FAQ
1.How can I place an order for 74ACT16541DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16541DL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74ACT16541DL reliable?
The price and inventory of 74ACT16541DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16541DL is usually 5 days.
3.What payment methods are accepted for 74ACT16541DL?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16541DL?
74ACT16541DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16541DL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74ACT16541DL?
For technical support, including 74ACT16541DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16541DL requirements.
6.How does Aetrix verify that 74ACT16541DL is sourced from the original manufacturer or authorized distributors?
All 74ACT16541DL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74ACT16541DL meets industry standards.
7.What is the process for return or replacement of 74ACT16541DL?
All 74ACT16541DL units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16541DL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74ACT16541DL part is unused and in its original packaging.
Return procedure for 74ACT16541DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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